Double cylinder two-position five-way valve

Abstract

The application discloses a double-cylinder two-position five-way valve, which comprises a valve body, wherein a cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity are sequentially arranged in the valve body and are communicated with each other, and the five cavities are all provided with air holes communicated with the outside; a left piston assembly is connected to one end of the valve body close to the first cavity and is used for controlling the on-off between the first cavity and the second cavity or the second cavity and the third cavity; and a right piston assembly is connected to one end of the valve body close to the fifth cavity and is used for controlling the on-off between the third cavity and the fourth cavity or the fourth cavity and the fifth cavity. The double-cylinder two-position five-way valve has low requirement on the cleanliness of a gas source, improves the applicability of the valve body, prolongs the service life of the valve body and reduces the use cost.

Description

Technical Field

[0001] This invention relates to the field of directional valve technology, and in particular to a dual-cylinder two-position five-way valve. Background Technology

[0002] Currently, the most common directional control valves on the market have either a sliding or piston-type valve core structure.

[0003] The slide valve is a typical throttling pressure amplification element, widely used due to its simple structure and manufacturing process. Its basic structure includes a valve core, a shoulder, a valve sleeve, and an air port. The slide valve controls the size and position of the throttling orifice by controlling the sliding of the valve core within the valve sleeve. The magnitude and direction of the valve core displacement determine the size and position of the throttling orifice, thus determining the magnitude and direction of the flow rate. However, the sliding valve core has the following problems:

[0004] 1. The valve core and sleeve of the spool valve are sealed by a gap, which results in leakage. This is a common problem with spool valves and cannot be avoided.

[0005] 2. The more shoulders a valve core has, the larger its axial dimension and the more difficult it is to manufacture. Therefore, spool valves are only suitable for small diameter and small flow conditions. Thus, spool valves are mostly regarded as typical throttling pressure amplification elements.

[0006] 3. Because the valve core and valve sleeve adopt a gap seal, the slide valve has high requirements for the cleanliness of the air source, so it can only be used in the control circuit and cannot be directly used in the main air circuit.

[0007] An internal piston valve core connects the valve plate to the piston via a valve stem. It primarily utilizes the piston to provide power, with the valve stem transmitting the piston force to the valve plate. The valve plate, valve stem, and piston form an "I" shape, hence the mechanism is sometimes called an I-shaped valve core. Due to its simple manufacturing process and low cost, the I-shaped valve core structure is widely used in valves as a primary power source, directly or indirectly participating in pneumatic or hydraulic circuits to achieve circuit switching or on / off control. While piston-type valve cores offer several advantages over sliding valve cores, such as slightly lower requirements for air source cleanliness, direct use in main air path switching, and the absence of shoulder structure limitations, allowing for use in large-diameter, high-flow-rate applications, existing piston-type structures also have certain drawbacks. Because there is no dustproof design between the piston and the main air path, piston and valve plate jamming can occur when the amount of dust in the air source reaches a certain level.

[0008] In summary, existing directional control valves have high requirements for the cleanliness of the air source, which not only makes them prone to failure or damage but also greatly increases costs. Summary of the Invention

[0009] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a double-cylinder two-position five-way valve, which has low requirements for air source cleanliness, improves the applicability of the valve body, prolongs the service life of the valve body, and reduces the use cost.

[0010] According to the double-cylinder two-position five-way valve of the present application, the valve body is internally provided with a chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber in sequence, and the five chambers are provided with air holes in communication with the outside. A left piston assembly is connected to one end of the valve body close to the first chamber, for controlling the on-off between the first chamber and the second chamber or the second chamber and the third chamber. A right piston assembly is connected to one end of the valve body close to the fifth chamber, for controlling the on-off between the third chamber and the fourth chamber or the fourth chamber and the fifth chamber.

[0011] According to the double-cylinder two-position five-way valve of the present application, at least the following beneficial effects are achieved:

[0012] By arranging the left piston assembly and the right piston assembly at both ends of the valve body, the communication between different chambers in the valve body is realized, which fundamentally avoids the air source from entering the inside of the valve body, thereby greatly reducing the influence of the air source on the valve body, prolonging the service life of the valve body, and reducing the requirements for air source cleanliness and use cost.

[0013] According to some embodiments of the present application, the valve body is internally provided with a first partition plate, a second partition plate, a third partition plate and a fourth partition plate in sequence, so as to divide the inside of the valve body into five chambers; the first partition plate, the second partition plate, the third partition plate and the fourth partition plate are all provided with corresponding notches.

[0014] According to some embodiments of the present application, the left piston assembly comprises a first cylinder, a first piston sheet, a first valve rod and a first valve sheet, the first cylinder is connected with the valve body, and the first valve rod is arranged in the valve body; the first valve sheet and the first piston sheet are respectively connected to both ends of the first valve rod, the first valve sheet is movably arranged in the second chamber, and the first piston sheet is slidably installed in the first cylinder.

[0015] According to some embodiments of the present application, the first valve sheet can be sealingly connected with the second partition plate to cut off the communication between the second chamber and the third chamber, and the first valve sheet can be sealingly connected with the first partition plate to cut off the communication between the first chamber and the second chamber.

[0016] According to some embodiments of the present application, the right piston assembly comprises a second cylinder, a second piston sheet, a second valve rod and a second valve sheet, the second cylinder is connected with the valve body, and the second valve rod is arranged through the valve body; the second valve sheet and the second piston sheet are respectively connected with two ends of the second valve rod, the second valve sheet is movably arranged in the fourth chamber, and the second piston sheet is slidably arranged in the second cylinder; the second valve sheet can be sealingly connected with the third partition plate to cut off the communication between the third chamber and the fourth chamber, or sealingly contact with the fourth partition plate to cut off the communication between the fourth chamber and the fifth chamber.

[0017] According to some embodiments of the present application, the first cylinder is provided with a gas hole M and a gas hole N at two ends in the axial direction, and the first piston sheet slides between the gas hole M and the gas hole N; the second cylinder is provided with a gas hole X and a gas hole Y at two ends in the axial direction, and the second piston sheet slides between the gas hole X and the gas hole Y; neither the first cylinder nor the second cylinder is in communication with the inside of the valve body.

[0018] According to some embodiments of the present application, the gas hole M is in communication with the gas hole X, and is connected with a gas supply device; the gas hole N is in communication with the gas hole Y, and is connected with a gas supply device.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in conjunction with the drawings and embodiments, in which:

[0021] Figure 1 It is a structural schematic view of the first position of the embodiment of the present application;

[0022] Figure 2 It is a structural schematic view of the second position of the embodiment of the present application.

[0023] REFERENCE NUMERALS

[0024] Valve body 100, first partition plate 101, second partition plate 102, third partition plate 103, fourth partition plate 104, first chamber 110, second chamber 120, third chamber 130, fourth chamber 140, fifth chamber 150;

[0025] Left piston assembly 200, first cylinder 210, first piston sheet 220, first valve rod 230, first valve sheet 240;

[0026] Right piston assembly 300, second cylinder 310, second piston sheet 320, second valve rod 330, second valve sheet 340. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary only, and are used only for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that the orientation description, such as the upper, lower, and the like, is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In the description of the present application, the plural refers to more than two. If there is a description of the first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0030] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0031] Referring to Figures 1 to 2 , a double-cylinder two-position five-way valve according to an embodiment of the present application includes a valve body 100 and left and right piston assemblies 200 and 300 installed at both ends of the valve body 100. The left and right piston assemblies 200 and 300 are identical in structure and are installed at both ends of the valve body 100 in the length direction.

[0032] Referring to Figure 1 , Figure 2As shown, the first baffle plate 101, the second baffle plate 102, the third baffle plate 103 and the fourth baffle plate 104 are sequentially and spacedly arranged inside the valve body 100 from left to right, so as to divide the inside of the valve body 100 into five chambers, which are a first chamber 110, a second chamber 120, a third chamber 130, a fourth chamber 140 and a fifth chamber 150 from left to right. The first baffle plate 101, the second baffle plate 102, the third baffle plate 103 and the fourth baffle plate 104 are all provided with corresponding notches, and the shape of the notches can be designed according to actual requirements, but it is necessary to ensure that the notch positions of all the baffle plates correspond. Since all the baffle plates are provided with notches, the five chambers can be completely communicated. The left piston assembly 200 is connected to one end of the valve body 100 close to the first chamber 110, and is used for controlling the on-off between the first chamber 110 and the second chamber 120 or the second chamber 120 and the third chamber 130. The right piston assembly 300 is connected to one end of the valve body 100 close to the fifth chamber 150, and is used for controlling the on-off between the third chamber 130 and the fourth chamber 140 or the fourth chamber 140 and the fifth chamber 150.

[0033] It should be noted that the five chambers are all provided with air holes communicating with the outside. As shown in Figure 1 、 Figure 2 The third chamber 130 is a middle chamber and is provided with an air hole A which is generally an air inlet. The second chamber 120 is provided with an air hole B, the fourth chamber 140 is provided with an air hole C, the first chamber 110 is provided with an air hole D, and the fifth chamber 150 is provided with an air hole E. The air hole A can communicate with the air hole B or the air hole C, the air hole B can also communicate with the air hole D, and the air hole C can also communicate with the air hole E.

[0034] In some embodiments of the present application, the left piston assembly 200 includes a first cylinder 210, a first piston sheet 220, a first valve rod 230 and a first valve sheet 240. The first cylinder 210 is connected with the valve body 100, and the first valve rod 230 is arranged through the valve body 100. The first valve sheet 240 and the first piston sheet 220 are respectively connected to two ends of the first valve rod 230. The first valve sheet 240 is movably arranged in the second chamber 120, and the first piston sheet 220 is slidably installed in the first cylinder 210. Specifically, the two sides of the first valve sheet 240 are both provided with sealing contact rings. The first valve sheet 240 can be sealingly connected with the second baffle plate 102 to block the communication between the second chamber 120 and the third chamber 130, and the first valve sheet 240 can be sealingly contacted with the first baffle plate 101 to block the communication between the first chamber 110 and the second chamber 120.

[0035] As shown in Figure 1 、 Figure 2As shown, the right piston assembly 300 is consistent with the structure of the left piston assembly 200, and the right piston assembly 300 comprises a second cylinder 310, a second piston sheet 320, a second valve rod 330 and a second valve sheet 340, the second cylinder 310 is connected with the valve body 100, and the second valve rod 330 is arranged in the valve body 100; the second valve sheet 340 and the second piston sheet 320 are respectively connected at two ends of the second valve rod 330, the second valve sheet 340 is movably arranged in the fourth chamber 140, and the second piston sheet 320 is slidably arranged in the second cylinder 310; the second valve sheet 340 can be in sealing connection with the third partition plate 103 to cut off the communication between the third chamber 130 and the fourth chamber 140, or in sealing contact with the fourth partition plate 104 to cut off the communication between the fourth chamber 140 and the fifth chamber 150.

[0036] In some embodiments of the present application, the first cylinder 210 is provided with a gas hole M and a gas hole N at two ends in the axial direction, and the first piston sheet 220 slides between the gas hole M and the gas hole N; the second cylinder 310 is provided with a gas hole X and a gas hole Y at two ends in the axial direction, and the second piston sheet 320 slides between the gas hole X and the gas hole Y; neither the first cylinder 210 nor the second cylinder 310 is in communication with the inside of the valve body 100.

[0037] In some embodiments of the present application, the gas hole M and the gas hole X are in communication and are connected with a gas supply device; the gas hole N and the gas hole Y are in communication and are connected with a gas supply device. It can be understood that the gas hole M, the gas hole N, the gas hole X and the gas hole Y can also be separately supplied with gas.

[0038] Referring to Figure 1 As shown, at this time, the gas supply device supplies gas into the gas hole N and the gas hole Y at the same time, pushes the first piston sheet 220 to slide away from the right piston assembly 300, drives the first valve sheet 240 to be in sealing connection with the first partition plate 101, thereby cutting off the communication between the first chamber 110 and the second chamber 120; the second piston sheet 320 slides towards the left piston assembly 200, drives the second valve sheet 340 to be in sealing connection with the third partition plate 103, thereby cutting off the communication between the third chamber 130 and the fourth chamber 140. At this time, the gas hole A and the gas hole B are in communication, and the gas hole C and the gas hole E are in communication.

[0039] Referring to Figure 2 As shown, at this time, the gas supply device supplies gas into the gas hole M and the gas hole X at the same time, pushes the first piston sheet 220 to slide towards the right piston assembly 300, drives the first valve sheet 240 to be in sealing connection with the second partition plate 102, thereby cutting off the communication between the second chamber 120 and the third chamber 130; the second piston sheet 320 slides away from the left piston assembly 200, drives the second valve sheet 340 to be in sealing connection with the fourth partition plate 104, thereby cutting off the communication between the fourth chamber 140 and the fifth chamber 150. At this time, the gas hole A and the gas hole C are in communication, and the gas hole B and the gas hole D are in communication.

[0040] It should be noted that the first valve rod 230 passes through the end wall of the valve body 100 and a chamber 110, the first valve rod 230 passes through the gap of the first partition plate 101, and the first valve rod 230 is in sliding sealing connection with the end wall of the valve body 100, that is, the first cylinder 210 is completely separated from the inside of the valve body 100, and the gas source in the first cylinder 210 cannot enter the valve body 100. The second valve rod 330 also passes through the gap of the fourth partition plate 104 and is in sliding sealing connection with the end wall of the other end of the valve body 100, that is, the second cylinder 310 is also completely separated from the inside of the valve body 100, so that the gas source is fundamentally prevented from entering the inside of the valve body 100, thereby greatly reducing the influence of the gas source on the valve body 100, prolonging the service life of the valve body 100, and also reducing the requirement for the cleanliness of the gas source and the use cost.

[0041] The above describes the embodiments of the present application in combination with the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A dual cylinder two position five port valve characterized by, The utility model relates to a valve body (100) is provided with first baffle (101), second baffle (102), third baffle (103) and fourth baffle (104) in sequence, and the valve body (100) is divided into one chamber (110), two chambers (120), three chambers (130), four chambers (140) and five chambers (150) in the valve body (100) and is communicated with each other, and five chambers are provided with air hole and communicate with the outside world. The utility model relates to a valve body (100) is provided with first baffle (101), second baffle (102), third baffle (103) and fourth baffle (104) in sequence, and the valve body (100) is divided into one chamber (110), two chambers (120), three chambers (130), four chambers (140) and five chambers (150) in the valve body (100) and is communicated with each other, and five chambers are provided with air hole and communicate with the outside world. ​ ​ 2. A dual cylinder two position five port valve according to claim 1 characterised in that: The first partition plate (101), the second partition plate (102), the third partition plate (103) and the fourth partition plate (104) are provided with corresponding notches.

3. A dual cylinder two position five port valve according to claim 1, characterized in that: The first cylinder (210) is provided with a gas hole M and a gas hole N at both ends of the axial direction, and the first piston sheet (220) slides between the gas hole M and the gas hole N; the second cylinder (310) is provided with a gas hole X and a gas hole Y at both ends of the axial direction, and the second piston sheet (320) slides between the gas hole X and the gas hole Y; the first cylinder (210) and the second cylinder (310) are not communicated with the inside of the valve body (100).

4. A two cylinder, two position, five port valve according to claim 3 characterised in that: The gas hole M is communicated with the gas hole X and is connected with a gas supply device; the gas hole N is communicated with the gas hole Y and is connected with a gas supply device.

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